Abstract—
Surface-barrier structures based on high-purity epitaxial GaAs layers with an ultrahigh-molecular-weight polyethylene converter were tested as fast-neutron detectors. The α-particle spectra and the response to fast neutrons were measured under exposure to a 241Am−Be source. The detectors demonstrated a high neutron-detection efficiency (1.22 × 10−3 counts/neutron) and an acceptable ratio of the signal to γ‑ray background (approximately 40). The possibility of using such detectors at temperatures as high as 120°C was shown.
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ACKNOWLEDGMENTS
This work was supported by the Ministry of Education and Science of the Russian Federation as a part of the State Task for the university no. 3.2794.2017/4.6.
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Translated by N. Goryacheva
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Chernykh, S.V., Chernykh, A.V., Britvich, G.I. et al. Fast-Neutron Detectors Based on Surface-Barrier GaAs Sensors with an Ultrahigh-Molecular-Weight Polyethylene Converter. Instrum Exp Tech 62, 312–316 (2019). https://doi.org/10.1134/S0020441219030138
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DOI: https://doi.org/10.1134/S0020441219030138